From f54ca1a0966bcdb525aee130a043a8adbccc5cbb Mon Sep 17 00:00:00 2001 From: Archit Taneja Date: Fri, 28 Jul 2017 16:17:04 +0530 Subject: [PATCH] drm/msm/dsi: Implement RPM suspend/resume callbacks The bus clocks are always enabled/disabled along with the power domain, so move it to the runtime suspend/resume ops. This cleans up the clock code a bit. Get rid of the clk_mutex mutex since it isn't needed. Signed-off-by: Archit Taneja Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/dsi/dsi.c | 5 ++ drivers/gpu/drm/msm/dsi/dsi.h | 2 + drivers/gpu/drm/msm/dsi/dsi_host.c | 83 +++++++++++++++--------------- 3 files changed, 49 insertions(+), 41 deletions(-) diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c index 311c1c1e7d6c..98742d7af6dc 100644 --- a/drivers/gpu/drm/msm/dsi/dsi.c +++ b/drivers/gpu/drm/msm/dsi/dsi.c @@ -161,12 +161,17 @@ static const struct of_device_id dt_match[] = { {} }; +static const struct dev_pm_ops dsi_pm_ops = { + SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL) +}; + static struct platform_driver dsi_driver = { .probe = dsi_dev_probe, .remove = dsi_dev_remove, .driver = { .name = "msm_dsi", .of_match_table = dt_match, + .pm = &dsi_pm_ops, }, }; diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h index 9e6017387efb..2302046197a8 100644 --- a/drivers/gpu/drm/msm/dsi/dsi.h +++ b/drivers/gpu/drm/msm/dsi/dsi.h @@ -179,6 +179,8 @@ void msm_dsi_host_destroy(struct mipi_dsi_host *host); int msm_dsi_host_modeset_init(struct mipi_dsi_host *host, struct drm_device *dev); int msm_dsi_host_init(struct msm_dsi *msm_dsi); +int msm_dsi_runtime_suspend(struct device *dev); +int msm_dsi_runtime_resume(struct device *dev); /* dsi phy */ struct msm_dsi_phy; diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index da0913a33ca0..dbb31a014419 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -135,7 +135,6 @@ struct msm_dsi_host { struct completion video_comp; struct mutex dev_mutex; struct mutex cmd_mutex; - struct mutex clk_mutex; spinlock_t intr_lock; /* Protect interrupt ctrl register */ u32 err_work_state; @@ -458,6 +457,34 @@ static void dsi_bus_clk_disable(struct msm_dsi_host *msm_host) clk_disable_unprepare(msm_host->bus_clks[i]); } +int msm_dsi_runtime_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct msm_dsi *msm_dsi = platform_get_drvdata(pdev); + struct mipi_dsi_host *host = msm_dsi->host; + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + if (!msm_host->cfg_hnd) + return 0; + + dsi_bus_clk_disable(msm_host); + + return 0; +} + +int msm_dsi_runtime_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct msm_dsi *msm_dsi = platform_get_drvdata(pdev); + struct mipi_dsi_host *host = msm_dsi->host; + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + if (!msm_host->cfg_hnd) + return 0; + + return dsi_bus_clk_enable(msm_host); +} + static int dsi_link_clk_enable_6g(struct msm_dsi_host *msm_host) { int ret; @@ -599,35 +626,6 @@ static void dsi_link_clk_disable(struct msm_dsi_host *msm_host) } } -static int dsi_clk_ctrl(struct msm_dsi_host *msm_host, bool enable) -{ - int ret = 0; - - mutex_lock(&msm_host->clk_mutex); - if (enable) { - ret = dsi_bus_clk_enable(msm_host); - if (ret) { - pr_err("%s: Can not enable bus clk, %d\n", - __func__, ret); - goto unlock_ret; - } - ret = dsi_link_clk_enable(msm_host); - if (ret) { - pr_err("%s: Can not enable link clk, %d\n", - __func__, ret); - dsi_bus_clk_disable(msm_host); - goto unlock_ret; - } - } else { - dsi_link_clk_disable(msm_host); - dsi_bus_clk_disable(msm_host); - } - -unlock_ret: - mutex_unlock(&msm_host->clk_mutex); - return ret; -} - static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host) { struct drm_display_mode *mode = msm_host->mode; @@ -1702,6 +1700,7 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi) } msm_host->pdev = pdev; + msm_dsi->host = &msm_host->base; ret = dsi_host_parse_dt(msm_host); if (ret) { @@ -1758,7 +1757,6 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi) init_completion(&msm_host->video_comp); mutex_init(&msm_host->dev_mutex); mutex_init(&msm_host->cmd_mutex); - mutex_init(&msm_host->clk_mutex); spin_lock_init(&msm_host->intr_lock); /* setup workqueue */ @@ -1766,7 +1764,6 @@ int msm_dsi_host_init(struct msm_dsi *msm_dsi) INIT_WORK(&msm_host->err_work, dsi_err_worker); INIT_WORK(&msm_host->hpd_work, dsi_hpd_worker); - msm_dsi->host = &msm_host->base; msm_dsi->id = msm_host->id; DBG("Dsi Host %d initialized", msm_host->id); @@ -1788,7 +1785,6 @@ void msm_dsi_host_destroy(struct mipi_dsi_host *host) msm_host->workqueue = NULL; } - mutex_destroy(&msm_host->clk_mutex); mutex_destroy(&msm_host->cmd_mutex); mutex_destroy(&msm_host->dev_mutex); @@ -1889,7 +1885,7 @@ int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host, * mdp clock need to be enabled to receive dsi interrupt */ pm_runtime_get_sync(&msm_host->pdev->dev); - dsi_clk_ctrl(msm_host, 1); + dsi_link_clk_enable(msm_host); /* TODO: vote for bus bandwidth */ @@ -1919,7 +1915,7 @@ void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host, /* TODO: unvote for bus bandwidth */ - dsi_clk_ctrl(msm_host, 0); + dsi_link_clk_disable(msm_host); pm_runtime_put_autosuspend(&msm_host->pdev->dev); } @@ -2169,8 +2165,11 @@ int msm_dsi_host_enable(struct mipi_dsi_host *host) * and only turned on before MDP START. * This part of code should be enabled once mdp driver support it. */ - /* if (msm_panel->mode == MSM_DSI_CMD_MODE) - dsi_clk_ctrl(msm_host, 0); */ + /* if (msm_panel->mode == MSM_DSI_CMD_MODE) { + * dsi_link_clk_disable(msm_host); + * pm_runtime_put_autosuspend(&msm_host->pdev->dev); + * } + */ return 0; } @@ -2227,9 +2226,10 @@ int msm_dsi_host_power_on(struct mipi_dsi_host *host, } pm_runtime_get_sync(&msm_host->pdev->dev); - ret = dsi_clk_ctrl(msm_host, 1); + ret = dsi_link_clk_enable(msm_host); if (ret) { - pr_err("%s: failed to enable clocks. ret=%d\n", __func__, ret); + pr_err("%s: failed to enable link clocks. ret=%d\n", + __func__, ret); goto fail_disable_reg; } @@ -2253,7 +2253,8 @@ int msm_dsi_host_power_on(struct mipi_dsi_host *host, return 0; fail_disable_clk: - dsi_clk_ctrl(msm_host, 0); + dsi_link_clk_disable(msm_host); + pm_runtime_put_autosuspend(&msm_host->pdev->dev); fail_disable_reg: dsi_host_regulator_disable(msm_host); unlock_ret: @@ -2278,7 +2279,7 @@ int msm_dsi_host_power_off(struct mipi_dsi_host *host) pinctrl_pm_select_sleep_state(&msm_host->pdev->dev); - dsi_clk_ctrl(msm_host, 0); + dsi_link_clk_disable(msm_host); pm_runtime_put_autosuspend(&msm_host->pdev->dev); dsi_host_regulator_disable(msm_host); -- 2.20.1